this post was submitted on 11 Dec 2024
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No. A bluetooth headset (or any wireless audio thing really) has to contain a bluetooth radio, a digital-analog converter, and an amplifier. The signal goes through all of that before it reaches the speaker. The aux input bypasses all of that and goes directly to the speakers, using whatever DAC is on the other end of the cable. It's purely an analog signal connection and can't power the electronics. It also means that when the battery inevitably goes cack, you can still use it with a wire.
Some expensive headphones, like the Focal Bathys, offer USB-C input, which essentially turns them into external sound cards. Excellent video, watch the entire thing.